if ($counter == $current_page) {
                    $ret .= '<option value="' . $this->url . (($counter - 1) * $this->perpage) . '" selected>' . $counter . '</option>';
                } else {
                    $ret .= '<option value="' . $this->url . (($counter - 1) * $this->perpage) . '">' . $counter . '</option>';
                }